Numerical analysis and treatment of a collapsed middle drift for shallow multi-arch tunnel under unsymmetrical pressure

LI Zhi-yong; YAN Li; YANG Jun-sheng

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Numerical analysis and treatment of a collapsed middle drift for shallow multi-arch tunnel under unsymmetrical pressure

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- Numerical analysis and treatment of a collapsed middle drift for shallow multi-arch tunnel under unsymmetrical pressure
- Vol. 28, Issue 1, (2007)
- 作者机构：
  
  1. 中南大学土木建筑学院,长沙,410075
  2. 湖南省交通科学研究院,长沙,410007
- 作者简介：
- 基金信息：
- DOI：
  CLC： U45
- Online First：28 August 2013，
  
  Published：2007
- 稿件说明：
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LI Zhi-yong, YAN Li, YANG Jun-sheng. Numerical analysis and treatment of a collapsed middle drift for shallow multi-arch tunnel under unsymmetrical pressure[J]. 2007, 28(1).
DOI：

LI Zhi-yong, YAN Li, YANG Jun-sheng. Numerical analysis and treatment of a collapsed middle drift for shallow multi-arch tunnel under unsymmetrical pressure[J]. 2007, 28(1). DOI：

摘要

某连拱隧道在中导洞施工时出现坍方。针对该隧道的工程实际情况，建立了数值分析模型，采用FLAC软件模拟了隧道施工力学行为，从围岩塑性区分布、位移情况以及锚杆和混凝土衬砌内力分布情况分析了隧道变形和坍塌发生的原因，并且结合工程实际提出了有效地处治方法。

Abstract

During construction of the middle drift of a multi-arch tunnel

collapse accident occurred. According to the field geological and construction conditions

the numerical model is set up; and the commercial software FLAC is adopted to simulate the behaviors of the tunnel and surrounding rock. Based on the results of plastic zones in surround rocks

deformations in rock and lining

and the inner forces within rock bolts and reinforced concrete lining

the deformation of the tunnel and the causes of tunnel collapse are analyzed. The corresponding effective remedy measures are proposed; and good results are achieved.

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